WAMS light and its deployment in China

It is determined by the nature of AC power grid that the disturbance in high voltage power grid can be reflected in low voltage power grid to some extent. The idea of the light synchronized phasor measurement unit (PMU Light) and that of the light wide-area measurement system (WAMS Light) was proposed and implemented in low voltage grid. Comparing the data recorded by WAMS and that recorded by WAMS Light, it is clear that the dynamic responses in high voltage power grid and low voltage power grid are strongly correlated. WAMS Light has already recorded several typical large disturbances. So WAMS Light has a broad application prospect in many fields. It also enlightens scholars to dig the value of the dynamic behavior of low voltage grid, the grid measurement theory, and even the way of the decentralized control of the power system.